PSI - Issue 31

Alok Gupta et al. / Procedia Structural Integrity 31 (2021) 15–21 Alok Gupta et al. / Structural Integrity Procedia 00 (2019) 000–000

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6

(b)

(a)

Fig. 5. (a) FRC in the axial direction showing the fundamental vibration mode at 84 Hz, (b) FRC in the tangential direction with distinct peaks at 84Hz and 183Hz (the second vibration mode).

5

3

1

4

2

Location 1

Fig. 6. SLM bracket after dwell test with numbers indicating the sequence and location of fracture, picture in the inset shows a magnified view of the first fracture in the middle diagonal strut

Location 1

(a)

(b)

Location 1

Crack Initiation

Beach Marks

Crack Propagation Direction

200  m

50  m

Fig. 7. (a) SEM micrograph showing crack initiation site of location 1 and direction of crack propagation, (b) SEM micrograph showing magnified view with beach marks at location 1